Observation Instance – Django REST framework

Get a list of Observation objects.

### Available end points:

- `/observations/` - Will list all Results in the database
- `/observations.json` - Will return all Results in json format. This can
also be achieved by using the accept header. `application/json`
- `/observations/<object_id>/` - Returns Results object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `status`
- `result_field`
- `discoveryKeywords`
- `updateFrequency`
- `nonGeographicFlag`
- `publicationState`
- `permissions`

### How to use filters:

These filters can be used like django query filters using __ for related model relationships.

- `/observations/?uuid=d594d53df2612bbd89c2e0e770b5c1a0`
- `/observations/?status=completed`
- `/observations/?results_field__dataPath__startswith=/neodc/esacci`
- `/observations/?discoveryKeywords__name=ESACCI`
- `/observations/?nonGeographicFlag=True`

Filters can be stacked to build an 'AND' relationship. E.g.

- `/observations/?publicationState__in=published,citable&nonGeographicFlag=True`
- `/observations/?publicationState__in=published,citable&discoveryKeyword__name=NDGO0003`

GET /api/v2/observations/19608/?format=api

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 19608,
    "uuid": "5e532731b36246009dcafdff25e396f8",
    "title": "Ground based measurements of carbon dioxide, methane and nitrous oxide taken from Villa Carmen (premontane forest) in the Peruvian Andes (2011-2013)",
    "abstract": "The dataset contains concentrations of carbon dioxide, methane and nitrous oxide which were collected in discrete air samples between 23rd July 2011 and 8th July 2013 by the University of St Andrews Thermo TRACE Gas Chromatograph Ultra at Villa Carmen, a premontane forest ecosystem ground site, in the Peruvian Andes. \r\n\r\nData were collected for the NERC project: 'Are tropical uplands regional hotspots for methane and nitrous oxide?' (NERC grant awards: NE/H007849/1, NE/H006753/1 and NE/H006583/2). \r\n\r\n\r\n\r\n",
    "keywords": "methane, nitrous oxide, Andes, Peru, tropical ecosystems, rainforest, greenhouse gases, carbon dioxide, soil-atmosphere gas exchange, forest, grassland",
    "publicationState": "citable",
    "dataPublishedTime": "2016-07-12T09:45:28",
    "doiPublishedTime": "2016-07-13T15:54:47",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/19621/?format=api",
        "dataPath": "/badc/ch4-n2o-hotspots/data/premontane",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 33714,
        "numberOfFiles": 2,
        "fileFormat": "Data are BADC-CSV formatted"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/5158/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/1634/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25856/?format=api"
    ],
    "dataLineage": "Data collected, processed and checked by the project team prior to delivery to the Centre for Environmental Data Analysis (CEDA) for ingestion into the CEDA archives",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/8979/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/19561/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/19563/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74438/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74452/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74327/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74329/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74335/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74334/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74453/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74451/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74328/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74331/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74330/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74332/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/74333/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/19616/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2522/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}